Spring biased actuator for a thermal delay valve or switch

Details Spring biased actuator for a thermal delay valve or switch Spring biased actuator for a thermal delay valve or switch

1980-01-03

1982-03-02

Beha, Jr., William H.

Electricity: electrothermally or thermally actuated switches

With separate distinct diverse art-type switching device

Bimetallic device with other

261 39E, 337 13, 337 53, 337107, 337354, H01H 6102

Patent

active

043180701

ABSTRACT:
An actuator for use as part of an electrically heated thermal delay valve (FIG. 1) or switch (FIG. 2) includes a thermally responsive plate (12) the periphery of which is fixed and the central part of which forms a temperature-dependent control element. The actuator also includes a metal carrier plate (9) which has a PTC element (10) mounted on it and which is free to move in a direction normal to its surface between stop abutments, and at least one spring (11) which electrically contacts the PTC element (10) and biases the carrier plate (9) towards the thermally responsive plate (9) to ensure that it is constantly in thermal contact with the carrier plate (10). This ensures that a direct thermal contact between the PTC element and the thermally responsive plate is constantly maintained which results in consistently reproducible functions being achieved with the apparatus by virtue of this direct thermal contact. The thermally responsive plate (9) may be biased towards the carrier plate (10).

REFERENCES:
patent: 2440709 (1948-05-01), Young
patent: 2543040 (1951-02-01), Mertler
patent: 3489976 (1970-01-01), Marcoux

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